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Thread: Maybe a dumb question
08-20-2013, 08:52 PM #1
Maybe a dumb question
But can my knock sensors being bad rob me of fuel efficiency or make my O2 sensors read faults?
Dont want to have to dig into the truck too much as that stuff costs money. But so does gas.
If at first you don't succeed, get a bigger cheater bar.
1999 GMC Sierra SLT Z71 | 5.3 "Vortec" | Spectre "Cold Air Intake" | TransDapt TBS | Hypertech 30005 Tune | 2005 Chevy Tail Lights | Denali headlights | Grill Mounted Fog Lights | AWS Bug Shield | 265/70/16 Futura Scramblers | Boss HD Speakers | 2005 Overhead Console | Flowmaster Super 40 mufflers 2N1O | Mostly stock-ish
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08-20-2013, 09:04 PM #2
Yes. The knock sensors are an important part of the ignition system, and their proper functioning helps the computer to adjust spark timing, so that a more complete burn of the fuel can happen. With bad knock sensors, you could not be completely burning the fuel, which can damage the O2 sensors, and then cause them to fault, making the gas mileage even worse.
08-20-2013, 09:18 PM #3
08-20-2013, 10:24 PM #4
Dumb question follow-up: how long do knock sensors usually last or what is a good interval to change them?Clint (TX) 2001 Silverado LS 4.8L auto 2wd ECSB [GARAGE]
Gasoline or gunpowder: If you ain't burning one, you ain't having fun!
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08-20-2013, 10:29 PM #5
I always thought when they throw codes. Water likes to get under the intake. Come to think of it I gotta change the head gaskets anyway so...
08-21-2013, 11:22 AM #6
im more or less one armed right now, but i will help with what i can.
2011 GMC Sierra SLE 5.3 Z71 4X4 Stealth Gray Metallic / 2004 Chevy Impala LS 3.8 Cappuccino
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